The world's largest flowers, some Rafflesia intermittently burst forth in three-foot wide, waxy-looking reddish blossoms that mimic the stench of rotting meat, hug the forest floor and tip the scales at 25 pounds.
"They also grow hairy interiors that resemble fur, a convincing act to attract the flies that pollinate them," says Nickrent. Yet not all Raffelesia blooms are monster-sized. Some produce only smaller, palm-sized blossoms.